The Weller LT K HPB (T0054441373) LT Series Soldering Tip is designed for use with WP 80 and WSP 80 soldering irons. The high mass tip is ideal for heavy ground planes and other applications with high mass requirements. It is made from solid copper and plated with iron, ensuring maximum durability and long life. Please note, however, that the LT K HPB tip cannot be used for lead-free soldering.